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[209.132.180.67]) by mx.google.com with ESMTP id 11si5724658otz.101.2019.12.05.05.12.09; Thu, 05 Dec 2019 05:12:23 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=puri.sm Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729473AbfLENLU (ORCPT + 99 others); Thu, 5 Dec 2019 08:11:20 -0500 Received: from comms.puri.sm ([159.203.221.185]:36586 "EHLO comms.puri.sm" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729146AbfLENLU (ORCPT ); Thu, 5 Dec 2019 08:11:20 -0500 Received: from localhost (localhost [127.0.0.1]) by comms.puri.sm (Postfix) with ESMTP id 1E4C6DFA98; Thu, 5 Dec 2019 05:11:19 -0800 (PST) Received: from comms.puri.sm ([127.0.0.1]) by localhost (comms.puri.sm [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id B1LJ11p7TmML; Thu, 5 Dec 2019 05:11:18 -0800 (PST) To: linux-usb@vger.kernel.org, gregkh@linuxfoundation.org, balbi@kernel.org Cc: kernel@puri.sm, linux-kernel@vger.kernel.org, p.zabel@pengutronix.de From: Martin Kepplinger Subject: suspend problem with dwc3 gadget / g_multi when usb disconnected Autocrypt: addr=martin.kepplinger@puri.sm; keydata= mQINBFULfZABEADRxJqDOYAHfrp1w8Egcv88qoru37k1x0Ugy8S6qYtKLAAt7boZW+q5gPv3 Sj2KjfkWA7gotXpASN21OIfE/puKGwhDLAySY1DGNMQ0gIVakUO0ji5GJPjeB9JlmN5hbA87 Si9k3yKQQfv7Cf9Lr1iZaV4A4yjLP/JQMImaCVdC5KyqJ98Luwci1GbsLIGX3EEjfg1+MceO dnJTKZpBAKd1J7S2Ib3dRwvALdiD7zqMGqkw5xrtwasatS7pc6o/BFgA9GxbeIzKmvW/hc3Q amS/sB12BojyzdUJ3TnIoAqvwKTGcv5VYo2Z+3FV+/MJVXPo8cj2vmfxQx1WG4n6X0pK4X8A BkCKw2N/evMZblNqAzzGVtoJvqQYkzQ20Fm+d3wFl6lS1db4MB+kU13G8kEIE22Q3i6kx4NA 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6BSKmJjlWpfkPKzyzjhGQVZrTZYnKAu471hRv8/6Dx5JuZJgDCnYanNx3DDreRMu/nq6TfaO ekMtxgNYb/8oDry09UFHbGHLsWn6oBo= Message-ID: <38edc05e-680b-d881-49fc-e8230a93b2c8@puri.sm> Date: Thu, 5 Dec 2019 14:11:13 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org hi, I'm running today's linux-next with this defconfig on a librem 5 devkit: https://source.puri.sm/martin.kepplinger/linux-next/blob/next-20191205/librem5/arch/arm64/configs/librem5_defconfig So I want to have host and gadget mode (G_MULTI, most importantly a serial ACM console), and I'm having trouble with S3 suspend: * The most interesting case here: When I boot with USB disconnected (from the battery) I can't suspend or unload dwc3. After "echo mem > /sys/power/state" I get nothing in the my logs except [ 18.107380] PM: suspend entry (deep) and the system hangs. similarly, I can't work around this by rmmod -f dwc3. What can go wrong here? I don't know enough about usb hci and why this shouldn't work. What can I do to help you here? * When I boot with USB connected, then unplug USB, I get: [ 19.289602] dwc3 38100000.usb: request 000000006a19695c was not queued to ep3in and then try to suspend: root@pureos:/home/purism# echo mem > /sys/power/state [ 37.863066] xhci-hcd xhci-hcd.0.auto: xHCI host controller not responding, assume dead [ 37.871345] xhci-hcd xhci-hcd.0.auto: HC died; cleaning up [ 37.877260] PM: dpm_run_callback(): platform_pm_suspend+0x0/0x78 returns -22 [ 37.884626] PM: Device xhci-hcd.0.auto failed to suspend async: error -22 [ 37.891728] PM: Some devices failed to suspend, or early wake event detected bash: echo: write error: Invalid argument * When I keep USB connected, the behaviour is similar actually, but rmmod works (but that use-case is not that interesting to me). Since my experience with USB drivers is limited, I'm glad to hear about any of your experience with dwc3- or more general gadget-problems with suspend and that or a similar configuration. Without G_MULTI and dwc3 host-only, suspend works btw. And all the above is basically identical on previous stable kernels too. thanks so far, martin